The Sailfin roughshark, (Oxynotus paradoxus), is a species of dogfish shark in the family Oxynotidae, found in the eastern North Atlantic from Scotland to Senegal between latitudes 41°N and 11°N, at depths of between 265 and 720 m (869 and 2362 ft). Its length is up to 1.2 m (3.9 ft).